I have a 128mm set (never did understand why Nervar chose to go proprietary on BCD), but I have indeed heard of the Simplex-compatible 122mm variations, but never seen one in captivity.
One can easily modify any 130mm ring or triplizer to 128mm by elongating the mounting holes inward by 1mm (been there ... done that, still have the 44T Shimano ring), but 122mm would be a different proposition.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069